what is an angstrom
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Micrometer Angstrom (å) Angstrom (å), unit of length used chiefly in measuring wavelengths of light, equal to 10 metre, or 0.1 nanometer. It is named for the 19th-century Swedish physicist Anders Jonas Ångström. The angstrom and multiples of it, the micron (10 å) and the millimicron (10 å), are also used to measure such quantities as molecular diameters and the thickness of films on liquids.
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- What is attohertz? An attohertz (aHz) is a SI-multiple (see prefix atto) of the frequency unit hertz and equal to 1.0 × 10-18 hertz.read more...». An angle, in geometry, is defined by two rays a and b sharing a common starting point S, called the vertex. These rays can be transformed into each other by a revolution or rotation.
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General Astronomy/Print version One billionth of a meter; approximately the length of three to six atoms placed side-by-side, or the width of a single strand of DNA; the thickness of a human hair is between 50,000 and 100,000 nanometers. A unit of measurement equal to one-billionth of one meter. The head of a pin is about 1 million nanometers across. A human hair is about 60,000 nanometers in diameter, and a DNA molecule is between 2-12 nanometers wide. A unit of measure.
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- A micron is a unit of measure in the metric system equal to 1 millionth of a meter in length (about 39 millionths of an inch). The average cross-section of a human hair is 50 microns. The human eye cannot see anything smaller than 40 microns in size. 50 microns – Diameter of a human hair.
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- Atoms have sizes on the order of 1-5  (1 angstrom = 1  = 1  10-10 m) and masses on the order of 1-300 amu. To put the mass and dimensions of an atom into perspective consider the following analogies. If an atom were the size of Ohio stadium, the nucleus would only be the size of a small marble.
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meter The meter was originally defined as one ten-millionth (0.0000001 or 10-7) of the distance, as measured over the earth's surface in a great circle passing through Paris, France, from the geographic north pole to the equator. One meter is a little more than three English feet, or about 39.37 inches. One foot is approximately 0.3048 meter. There are about 1609 meters in a statute mile. The official span was at one time formally defined as the separation between two scratches on a platinum bar in Paris.
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- Spectroscopy is a very important tool in astronomy. It is detailed study of the light from an object. Light is energy that moves through space and can be thought of as either waves or particles. The distances between the peaks of the waves of light are called the light's wavelength.
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When Atoms Are Getting Close: Shortest Carbon-chlorine Single Bond Detected An Angstrom is 10-7 millimeters. The distance, now detected between the atoms, is the shortest distance ever observed for comparable chlorine-carbon single bonds. All previously measured distances fall within the range of approximately 1.71 and 1.91 Angstroms.
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nanometer nanometer (nm) (nan´əmē´tər), n a billionth of a meter (109 meter). This term is now preferred over millimicron. nanometer. a unit of linear measure or wave length equal to one-thousand-millionth (10−9) of a meter; nm; millimicron. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, or visit the webmaster's page for free fun content.
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Metre The metre (international spelling) or meter (American spelling), (from the Greek noun μέτρον, measure) is the base unit of length in the International System of Units (SI). The SI unit symbol is m. The metre is defined as the length of the path travelled by light in a vacuum in 1299 792 458 seconds. The metre was originally defined in 1793 as one ten-millionth of the distance from the equator to the North Pole.
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- Save. A digital video recorder, or DVR, is a device that is used to record digital TV programs onto a hard disk. Connecting the DVR to an alternate video recording device allows you to record video from the DVR to an external storage medium such as a DVD disc. Perhaps you've made a DVR recording of a concert, interview or comedy special, and you just want to save the program's audio without the video on an external disc.
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Metre The metre, American spelling meter, (from the Greek noun μέτρον, measure) is the base unit of length in the International System of Units (SI). The SI unit symbol is m.The metre is defined as the distance travelled by light in a specific fraction – about one three-hundred millionths – of a second.The metre was originally defined in 1793 as one ten-millionth of the distance from the equator to the North Pole.he SI unit symbol is m. The metre is defined as the distance travelled by light in a specific fraction – about one three-hundred millionths – of a second. The metre was originally defined in 1793 as one ten-millionth of the distance from the equator to the North Pole.
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- What is a nanometer? A nanometer is one billionth of a meter. (A meter is 39.37 inches, or slightly longer than one yard.) The prefix “nano” means “one billionth”, or 10-9, in the international system for units of weights and measures. For visual examples of the size of the nanoscale, see The Size of Nano.
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metre 1. The fundamental unit of length in both the SI and metric system, equivalent to 39.37007874 inches. Defined to be the length of path traveled by light in a vacuum in 1/299792458 sec. 2. A device for measuring the quantity of that which passes through it.
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What is Ultraviolet, UV? A nanometer is a unit of spatial measurement that is  10-9 meter, or one billionth of a meter. It is commonly used in nanotechnology, the building of extremely small machines.
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Relative atomic mass Relative atomic mass (symbol: Ar) is a dimensionless physical quantity, the ratio of the average mass of atoms of an element (from a single given sample or source) to 1⁄12 of the mass of an atom of carbon-12 (known as the unified atomic mass unit).
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What is an Angiodysplasia? Angiodysplasia is a medical condition in which the intestine is malformed or twisted, causing blood vessels to enlarge and become fragile and eventually causing tears or lesions in the intestinal wall.
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Ammeter An ammeter is a measuring instrument used to measure the electric current in a circuit. Electric currents are measured in amperes (A), hence the name. Instruments used to measure smaller currents, in the milliampere or microampere range, are designated as milliammeters or microammeters.
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- March 2014. A micron is a unit of measure in the metric system equal to 1 millionth of a meter in length (about 39 millionths of an inch). The average cross-section of a human hair is 50 microns. The human eye cannot see anything smaller than 40 microns in size. 50 microns – Diameter of a human hair.
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metre metre. n. 1. (Units) a metric unit of length equal to approximately 1.094 yards. 2. (Units) the basic SI unit of length; the length of the path travelled by light in free space during a time interval of 1/299 792 458 of a second.
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- Now, 1 angstrom is equal to 0.0000000001 meter. So, the length of the human genome is about: 1.02 meters or around 40 inches. On the other hand, the diameter of DNA is around 2 nanometers (nm).That's two billionths of a meter, or 2x10 -9 m. Some comparisons: many atoms are 0.1-0.2 nm in diameter.The common cold virus is a sphere 30 nm across.nswer 1: I did not know the answer to this off the top of my head, but there is a way to do a rough calculation. There are about 3 billion nucelotides in human DNA. The average length of a human nucleotide is 0.6 nanometers, or 0.0000000006 meters, so human DNA is about 1.8 meters (5 feet) long.
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- The Angoff Method is a widely used standard-setting approach in test development. In plain English, it is a kind of study that test developers use to determine the passing percentage (cutscore) for a test. The passing grade of a test can’t be decided arbitrarily; it must be justified with empirical data.
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- What is the risk of giving birth to a child with Down syndrome for a woman who is 40 years old compared with a 20 year old? A woman's risk of giving birth to a child with Down syndrome  increases as she gets older. A 40 year old is much more likely to  be in this situation than a 20 year old.
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Nanometre The nanometre (International spelling as used by the International Bureau of Weights and Measures; SI symbol: nm) or nanometer (American spelling) is a unit of length in the metric system, equal to one billionth of a metre (6991100000000000000♠0.000000001 m).
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- Meter is a metric system base length unit and defined as the length of the path travelled by light in vacuum during a time interval of 1/299,792,458 of a second. It is spelled as metre in europe and also commonly mistaken for the device meter. It equals to 3.2808399 feet, 39.3700787 inches.
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aisle aisle. n. 1. A part of a church divided laterally from the nave, transept, or choir by a row of columns. 2. A passageway between rows of seats, as in an auditorium or an airplane. 3.isle. n. 1. a passageway separating seating areas in a theatre, church, etc; gangway. 2. (Architecture) a lateral division in a church flanking the nave or chancel.